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1、石河子大學(xué)碩士學(xué)位論文瑪納斯河流域棉田土壤有機(jī)碳含量時(shí)空變化的分析姓名：柳紅東申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：作物栽培學(xué)與耕作學(xué)指導(dǎo)教師：張鳳華20070601Abstract【Objective】：Higheffectivedevelopmentofoasisagriculturebasedonsoilsustainabledevelopment，SOCnotonlyindicatedN、Pavailablestaleandsoilphysi

2、calproperties，butalsowasallimportantindexoffarmlandsystemstabilizationandsnstainabilityManasfivervalleywasthelargestplantingcottonregionplantingcottonareawas60～70％oftotalarablelandarea(exceptpiedmontplain)singleplantings

3、tnJctureSothisarticleanalyzedthespatialvariationlawofcotlonSOCintheManasRiverValleyandtreadsofSOCindifferentplantingway[Method]：Basedonthedataofthesecondsoilsurveyandsamplingin2005and2006throughlonglocatedexperiments，ahe

4、mativefunction、thesoilparticleandfractalmodel、DNDCmodelthisarticleanalyzedtemporal—spatialvariationofSOCcontentintypicalcottonfieldoftheManasrivervalley[Results]；ThetotalorganiccarbonstockinsoilofManasfivervalleywasI1354

5、65x106～1175306x10ekg，estimatedbyusingtheanalyticaldataofthesecondsoilinvestigationAeaseofShiheziCottonArableSoil，fromsouthtonorth，SOCwasdecreased。organiccarbonstockwasalluvialfanalluvialplaindeltaSimplecorrelationanalysi

6、sindicatedthatthefractaldimensionswassignificantpositivecorrelationwiththecontentsofSOCSoilclaysContentplayedanimponantroleinaccumulationofSOCwiththeincreaseoflatitudeTherewasadecreasingtrendincottonfieldSOCThesametrends

7、wereHU—CandFA—C，TherewasamaximumofHACatedgebeltofalluvialfan，anddecreasedinalluvialplain，thenitwasincreasedindeltaTheHMFAratioandKosshowedincreasingtreadsSOCwasreducedgradualtywithsoilprofiledepthincreased，buttheorganicc

8、arboncompositionscontentwasdifferentintandfo∞sCottonfieldSOTS“hadbeendescendedbeforethe90sbecauseofonlyonefertilizationmethodCottonfieldSOCwasgainedwiththerateofstrawapplicationexpandingafter90’smiddleThecontentofSOCwasi

9、ncreasedincottonfieldduringdifferentcontinuouscroppingyearsinValleyofManasRiverbecauseofCottonstrawapplication，butmostofitwasHUC，TheHA／FAratiowasdecreasedanddeclinedtoJafter8yearscontinuouscroppingTheKoswasdecreasedbefor

10、e9yearscontinuouscropping，andthenincreasedRotationofcotton，silagecomandcouoncanimproveHA／FAandreduceKosDNDCmodelwasvalidatedbyusinglong—termexperimentinManasfivervalleyTherewasahighsimilaritybetweenthesimulatedvaluesandm

11、easuredvaluesTheresultsderivedfromtestedsimulationsfor20yearsshowedthatSOCwasincreasedundertotalor50％cottonstrawapplication，itwasdecreasedundernocottonstrawapplicationat58eCkgofinitialSOCIfinitialSOCwas150#ks，SOCwouldbed

12、ecreasedundernocottonstrawapplication，orincreasedundertotalor500／“cottonstrawapplicationbefore2years，thandecreasedRoTationofcottonandsilageCOil3yearbyyearcanimproveSOC，butitwasinferiortoconlirlnonscroppingcottonPlantings

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